摘要
为研究杭州市区春季绿地及其周围的环境对PM_(2.5)颗粒物的影响机制,本文选取了8块样地作为研究对象,每个样地各设5个样点进行PM_(2.5)数据采集,并对样点进行植物群落结构、郁闭度、周边环境调查。结果表明,PM_(2.5)浓度与污染源距离成反比;城市绿地对PM_(2.5)颗粒物的消减有明显作用;以乔灌草为主、郁闭度大的绿地对PM_(2.5)具有较好的消减作用;水面与铺装为干扰类环境因素,使城市绿地对PM_(2.5)颗粒物的消减作用变得不稳定;在不同的空气质量等级下,城市绿地对PM_(2.5)的消减能力存在差异性。
Eight pieces of samples are selected as the research object so as to study the influence for PM2.5 particles which green space in spring and its surrounding environment have exerted in Hangzhou city. Each sample was set five sampling points for PM2.5 data collection, and a survey is conducted on plant community structure, canopy density and its surrounding environment. The result indicates that concentration of PM2.5 is inversely proportional to the distance of pollution. City green space, especially arbor-shrub-lawn type of city green space with high canopy density, has a positive effect on the reduction of PM2.5. The water surface and pavement, as the disturbing environmental factors, make the reduction of PM2.5 particles less evident and stable. Under the different air quality level, there exist obvious differences in the reduction of PM2.5.
出处
《风景园林》
2017年第5期79-86,共8页
Landscape Architecture
